Printing-plate holder



W. S. WARNOCK.

I PRINTING PLATE HOLDER. APPLICATION mm" uov. Is. 1920.

Patented June 21, 1921.

direction in'which the nut is turned. JThe invention willbe morefullyset forth WALLACE s. V/ABNOCK,

PATENT arm or omcneo; rnnmors.

PRINTINGrPLATE HOLDER.

' Application filed November 15, 1920. Serial No. 424,026. I

To all whom it may concern:

Be it known that I, WALLAOE S. WARNooir, citizen of the United States; residing at Chicago, in the county of Cool: and frltate of illinois, have invented a certain new and useful Improvement in Printing-Plate Holders, of which the following is a full, clear, concise, and exact description.

lfy invention relates to printing plate holders and has'i'or its; general object the provision oi simplified mechanism entering into the construction of the holder so that the holding jaw thereof may readily be applied to a plate to be clamped thereby and may be shifted in location to suit the location of the work to beheld.

In the preferred embodiment of the in vention the printing plate foundation, such as the flat bed of a pre'ssor a cylindrical form cylinder, is provided with cylindrical holes therein each having an annular enlargement below the work supporting face of the foundationto form a retaining shoulder. A carrier is employed thatis prefers ably a cylindrical shell or a diameter permitting it to bepassed down into any-of said holes. In the preferredconstruction'a lever is mounted uponand within the shell to be.

engageable beneath the retaining shoulder whereby theshell and foundation are held firmly in'assembly; There is a clamping jaw that desirably has an inward extension which is pivoted to and within the shell and the means for actuating the j aw is desirably,

inclusive of athreaded rod supported at the. outer end of the shell where the engaging portion of the jaw is located, and a nut threaded upon this rod,*the nuthaving an annular groove in which a portion of the 'j aw structure is received whereby the aw is.

moved back and forth according to the by a description of the preferred embodiment thereof shown a in the: accompanying drawing and in' which Figure 1 is aside view of apart of a printing press cylinder that supportsa cylindrical bed withwhich' my plate holding mechanism is assembled;

Fig.2 isa planview, on alarge scaleuofthe device of my invention in place within an opening'in theprinting foundationyFig. 3

Specification of LettersPatentL Pzttflted J 11116 21, 1921- i is a view in elevation, with parts broken away, of the structure of my invention; Fig. 1

4: isa sectional view on line 4-4 oifiFig. 3; Fig. 5 1s a sectional view illustrating the shell in a mid portion within one or the holes 1n the printing foundation, the jaw and the i mechanism for actuating the being omitted in order that "the lever arrangement might more clearly appear; Fig. 6 is-a plan view oi the shell and lever mechanism shown blocks constituting a printing toundation, a.

printing plate being shown assembled with this block with. the devices of my invention and Fig. 8 is an end View of the block shownv in ig. 7 with the plate removed. j "Like parts are indicated by similar characters of reference throughout the different 1 Whether the printing bed or foundation beinthe form of a cylinder'l as indicated in Fig. 1, OllS flat as whenit-is mad'e up of a number of sectional blocks 2 as. indicated:

in Fig. 7, it-is formed with'a' plurality of cylindrical holes 33 which are preferably dis posedin spiralrows in the caseof the rotary V foundation and in oblique rows in: the case Each hole is desirably pro vided'with an annular enlargement 4: below of a flat bed.

the worksupporting taceof the foundation whereby there is provided in each hole' preierably near the bottom 'thereof an annular retaining shoulder 5. v Carrier's 6 are used in sutiicient number to holdtheprinting plate or form"? upon itsbed, these carriers sup porting the worl: engagingimechamsm.

The carriers are preferably cylindrical in order that they may be snugly recelved within the holes within which they are rota:

' table in order that the work eng'aging mechanism maybe position-ed to'suit the" location. of the work that is to be held upon the" printing foundat1on.- A lever 8 is mounted upon and within each shell 6, therebeing a pin 9 upon which the intermediate portion of the lever is journal'ed, this pin being secured at its ends to oppositeportions ofthe shell. 7 formed with a nose IOoneratmg through a slot 11 formed longitudinallyof the shell The lower end, of the lever, is

through the lower half thereof. The lengths of the holes 3 are preferably such that the shell, when resting upon the bottom of a hole, will so position the nose 10 of the lever 5 that when the lever is swungto move this.

nose outwardly the nose will become engaged beneath the retaining shoulder to hold the shell and printing foundation in firm as sembly. The lever projects at its upper end.

just slightly above the shell in order that it may begrasped by the manipulator to bring the lever nose into and. out of position.

The shell is sufliciently shorter than the hole so that the upper end of the lever will not project above the work supporting face of the foundation.

- As shownmost clearly in Fig. 6, the shell is formed with an inturned car 12 that serves as a detent upon the right hand side of which the upper end of the lever is disposed. after the nose 10 is engaged beneath'the re opposite portions of'the upper end of the I shell. @A jawadjusting-nut'fl is threaded.

' uponthe rod 16 and is preferably formed I with an annular groove 18 that receives the able'operating tool. As illustrated, the nut 40 :is provided with teeth 19 on one end thereof;

An adjusting hand operated rack may have" its teeth brought into engagement with the teeth 19 of the nut. By-moving the hand rack in one direction the nut is turned to move the jaw against the work. By reversing the movement of the hand rack the jaw iswithdrawnfrom the work.

. It -will be observed that the cylindrical shells may readily beturned within the holes that receive them to vcause the jaws to face selected directions whereby the'workmay 'be held upon the foundation in any selected position. The assembly of the plate holders with the foundation is quickly effected and firmly maintained, it being impossible for the holders to fall out of place if the mechanism for assembling them with the foundas tion has been properly operated.

The simpllcity in the construction of my 7 device and the effectiveness thereof will'be readily appreciated by, those skilled in the art.

any described theiprefcrred embodiment of i myinvention I do not wish to be limited to low the work supporting face of the founda rod mounted upon and extending across said This A. threaded rod 16 is secured at its ends to" j aw structure whereby the jaw is moved back and forth'according to the direction in which the nut is turned. The nut may be suitably formed we enable it to be engaged by a suit- 7 the precise details of construction shown as changes may readily be made without departing from the spirit of my invention, but having thus described my invention I claim .as new anddesire to secure by Letters Patent. 7 O the following j 1'. Thecombination with a printing foundation formed with cylindrical holes therein each having an annular enlargement'betionto form aretain'ing shoulder; of a carrier in the form of a cylindrical shell of'a diameter permitting it to be passed down into anyof said holes; a lever mounted upon andwithin said shell andengageable beneath said retaining shoulder; a clamping jaw located above said shell and printing foundation and having an inward extension pivoted to and within the shell; a threaded shell; and a" jaw adjusting nut upon 'said rod and formed with Jan annular groove in which the jaw structure is received whereby the jaw is moved back and forth according to the'direction in which the nut is turned.

1 2; The combination with a printing foundation formed with cylindrical holes therein each havingan annular enlargement below the work supporting face of the foundation toform a retainingfshoulder; of a carrier in the form of a cylindricalshell of a diameter permitting it to be passed down into any of' 'said holes; a lever mounted upon and within said shell and engageable beneath sald retalning shoulder; a clamping jaw 100.

upon said shell and/at itsouter end; and a; jaw actuating device upon said shell.

The-combination with aprinting 'foundation formed with cylindrical holes therein: 'e'achfihaving an annular enlargement below the work supporting face of thefoundation to-form a retaining shoulder; of a carrier" in the form of a cylindrical shell of a diameter permitting it to be passed down intoiany of-said holes; a detaining-element upon the shell engageable beneath said. retaining shoulder; a clamping jaw located above-said shell and printing foundation and having an inward extension pivoted to and within the shell; a threaded rodmounted upon and'extending across said shell; and a jaw adjust ing nut upon said rod and formed with an annulargroove in whichthe jaw structure is received whereby the'jaw is moved back and forth according to the direction inwhich the nut is turned. T

4:. The combination with a printing foundation formed with cylindrical holes therein each'having an annular enlargement below to form a retaining shoulder; of acarrier in V theform of akcyli'ndrical shell of a diameter Whi1e I have hereinshownand particu= permitting it to be passed down into any of said holes; adetaining-"element upon'the;

shoulder; a clamping jaw upon said shell and at its outer end; and a jaw actuating device upon said shell.

5. The combination with a printing foundation formed with cylindrical holes therein; of a carrier in the form of a cylindrical shell of a diameter permitting it to be passed down into any of said holes; a clamping jaw located above said shell and printing foundation and having an inward extension pivoted to and within the shell; a threaded rod mounted upon and extending across said shell; and a jaw adjusting nut upon said rod and formed with an annular groove in which the jaw structure is received whereby the jaw is moved back and forth accordin to the direction in which the nut is turne 6. The combination with a printing foundation formed with cylindrical holes therein; of a carrier in the form of a cylindrical shell of a diameter permitting it to be passed down into any of said holes; a clamping jaw upon said shell and at its outer end; and a jaw actuating device upon said shell.

7 The combination with a printing foundation formed with holes therein each enlarged below the foundation to form a retaining shoulder; of a carrier in the form of a shell of a size permitting it to be passed down into any of said holes; a lever upon the shell and engageable beneath said retaining shoulder to hold the shell and foundation together; a clamping jaw upon said shell and at its outer end; and a jaw actuating device upon said shell.

8. The combination with a printing foundation formed with holes therein; of a carrier in the form of a shell of a size permitting it to be passed down into. any of said holes; a lever upon the shell and engageable with the foundation to hold the shell and foundation together; a clamping jaw upon said shell and at its outer end; and a jaw actuating device upon said shell.

9. The combination with a printing foundation formed with cylindrical holes therein; of a carrier in the form of a cylindrical shell of a diameter permitting it to be passed down into any of said holes; a detaining element upon the shell and engageable with the foundation to hold the shell and foundation in assembly; a clamping jaw upon said shell and at its outer end; and a jaw actuating device upon said shell.

In witness whereof, I hereunto subscribe my name this 11th day of November, A. D

' WALLACE S. WARNOCK. 

